added more PC-98 formats.

MIA, MAI2, MAI3 images, D-Motion archives.

Author: morkt

Legacy/DMotion/ArcDM.cs

@@ -0,0 +1,89 @@
+//! \file       ArcDM.cs
+//! \date       2023 Oct 24
+//! \brief      D-Motion engine resource archive.
+//
+// Copyright (C) 2023 by morkt
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to
+// deal in the Software without restriction, including without limitation the
+// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+// sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+// IN THE SOFTWARE.
+//
+
+using System.Collections.Generic;
+using System.ComponentModel.Composition;
+
+namespace GameRes.Formats.DMotion
+{
+    internal class ExtEntry : Entry
+    {
+        public int Count;
+    }
+
+    [Export(typeof(ArchiveFormat))]
+    public class PakOpener : ArchiveFormat
+    {
+        public override string         Tag => "256/DMOTION";
+        public override string Description => "D-Motion engine resource archive";
+        public override uint     Signature => 0x4B434150; // 'PACK'
+        public override bool  IsHierarchic => false;
+        public override bool      CanWrite => false;
+
+        public override ArcFile TryOpen (ArcView file)
+        {
+            if (!file.View.AsciiEqual (4, "FILE100DATA"))
+                return null;
+            if (!file.View.AsciiEqual (0x10, @".\\\"))
+                return null;
+            int ext_count = file.View.ReadUInt16 (0x16);
+            long index_pos = file.View.ReadUInt32 (0x18);
+            int total_count = 0;
+            var ext_dir = new List<ExtEntry> (ext_count);
+            for (int i = 0; i < ext_count; ++i)
+            {
+                var ext = new ExtEntry {
+                    Name   = file.View.ReadString (index_pos, 4),
+                    Count  = file.View.ReadUInt16 (index_pos+6),
+                    Offset = file.View.ReadUInt32 (index_pos+8),
+                    Size   = file.View.ReadUInt32 (index_pos+12),
+                };
+                ext_dir.Add (ext);
+                total_count += ext.Count;
+                index_pos += 0x10;
+            }
+            if (!IsSaneCount (total_count))
+                return null;
+
+            var dir = new List<Entry> (total_count);
+            foreach (var ext in ext_dir)
+            {
+                index_pos = ext.Offset;
+                for (int i = 0; i < ext.Count; ++i)
+                {
+                    var name = file.View.ReadString (index_pos, 8).TrimEnd() + ext.Name;
+                    var entry = Create<Entry> (name);
+                    entry.Offset = file.View.ReadUInt32 (index_pos+8);
+                    entry.Size   = file.View.ReadUInt32 (index_pos+12);
+                    if (!entry.CheckPlacement (file.MaxOffset))
+                        return null;
+                    dir.Add (entry);
+                    index_pos += 0x10;
+                }
+            }
+            return new ArcFile (file, this, dir);
+        }
+    }
+}